Possible hybrid Caspian (L. cachinnans) x Herring Gull (L. argentatus)

Juvenile Gull moulting to 1st-winter plumage at Dumpiai, Klaipeda, Lithuania 8.9.2008.
Green 02P4 was ringed as pullus in Bolshoye, Russia 1305km NE 8.6.2008. Foto: Hannu Koskinen

10.9.2008. Foto: Hannu Koskinen